The phrase "and even more problematic" is correct and can be used in written English.
It is commonly used to add additional emphasis or to introduce a related issue or problem that is possibly more concerning than the previous one. Example: "The company's financial troubles have had a significant impact on its employees, and even more problematic, its customers are also feeling the effects."
This also applies to the large and even more problematic set of issues concerning data security and data utilisation.
All this sets those novelists bent on writing amusingly about class the almost insuperable difficulty of establishing their terms, and – even more problematic, perhaps – convincing readers of the accuracy of their judgments.
It would be more problematic to speak of X's neighbors forgiving the bus bomber for X's injuries, and even more problematic to speak of people whom X has never met forgiving the bomber.
Allergen can not readily directly enter the healthy sinuses either by diffusion or by ciliary flow, and, even more problematic remains the loss of patency of the sinus ostia with sinusitis.
She could not imagine Shirley Monaghan sitting here, with a problematic pregnancy and an even more problematic dog, who was gnawing on something in his crate, possibly his own leg.
But many of those same questions remain, and are even more problematic as another round of bids go forward.
Medically unexplained physical symptoms (MUPS) are common in general practice (GP), and are even more problematic as they become persistent.
However, model assessment is already challenging when only one source of data is involved (e.g. see Knock and O'Neill, 2014; Lau et al., 2014, for examples in the infectious diseases literature), and becomes even more problematic when simultaneously modelling multiple sources of information.
The proposed counter-extremism and safeguarding bill is even more problematic and led to an unexpected alliance of civil society groups, faith communities and leading figures within security and journalism coming together to highlight their concerns.
The small majority could make the passage of major legislation in areas like Social Security, taxes and health care even more problematic.
It is difficult to precisely define the concept of value-based radiology, and it is even more problematic to develop metrics which would allow a clear demonstration of the benefits contributed by imaging to the care of patients.
